[5.8] Use coalesce operator

src/Illuminate/Auth/Passwords/PasswordBrokerManager.php

@@ -46,9 +46,7 @@ public function broker($name = null)
     {
         $name = $name ?: $this->getDefaultDriver();
 
-        return isset($this->brokers[$name])
-                    ? $this->brokers[$name]
-                    : $this->brokers[$name] = $this->resolve($name);
+        return $this->brokers[$name] ?? ($this->brokers[$name] = $this->resolve($name));
     }
 
     /**

src/Illuminate/Container/Container.php

@@ -546,11 +546,7 @@ protected function rebound($abstract)
      */
     protected function getReboundCallbacks($abstract)
     {
-        if (isset($this->reboundCallbacks[$abstract])) {
-            return $this->reboundCallbacks[$abstract];
-        }
-
-        return [];
+        return $this->reboundCallbacks[$abstract] ?? [];
     }
 
     /**
@@ -1122,11 +1118,7 @@ protected function getExtenders($abstract)
     {
         $abstract = $this->getAlias($abstract);
 
-        if (isset($this->extenders[$abstract])) {
-            return $this->extenders[$abstract];
-        }
-
-        return [];
+        return $this->extenders[$abstract] ?? [];
     }
 
     /**

src/Illuminate/Database/Query/Grammars/Grammar.php

@@ -733,9 +733,7 @@ protected function compileOrders(Builder $query, $orders)
     protected function compileOrdersToArray(Builder $query, $orders)
     {
         return array_map(function ($order) {
-            return ! isset($order['sql'])
-                        ? $this->wrap($order['column']).' '.$order['direction']
-                        : $order['sql'];
+            return $order['sql'] ?? $this->wrap($order['column']).' '.$order['direction'];
         }, $orders);
     }
 

src/Illuminate/Queue/Console/ListFailedCommand.php

@@ -98,11 +98,7 @@ protected function matchJobName($payload)
     {
         preg_match('/"([^"]+)"/', $payload['data']['command'], $matches);
 
-        if (isset($matches[1])) {
-            return $matches[1];
-        }
-
-        return $payload['job'] ?? null;
+        return $matches[1] ?? $payload['job'] ?? null;
     }
 
     /**

src/Illuminate/Support/Testing/Fakes/NotificationFake.php

@@ -173,11 +173,7 @@ public function hasSent($notifiable, $notification)
      */
     protected function notificationsFor($notifiable, $notification)
     {
-        if (isset($this->notifications[get_class($notifiable)][$notifiable->getKey()][$notification])) {
-            return $this->notifications[get_class($notifiable)][$notifiable->getKey()][$notification];
-        }
-
-        return [];
+        return $this->notifications[get_class($notifiable)][$notifiable->getKey()][$notification] ?? [];
     }
 
     /**

src/Illuminate/Translation/ArrayLoader.php

@@ -25,11 +25,7 @@ public function load($locale, $group, $namespace = null)
     {
         $namespace = $namespace ?: '*';
 
-        if (isset($this->messages[$namespace][$locale][$group])) {
-            return $this->messages[$namespace][$locale][$group];
-        }
-
-        return [];
+        return $this->messages[$namespace][$locale][$group] ?? [];
     }
 
     /**

src/Illuminate/Translation/Translator.php

@@ -131,11 +131,7 @@ public function get($key, array $replace = [], $locale = null, $fallback = true)
         // If the line doesn't exist, we will return back the key which was requested as
         // that will be quick to spot in the UI if language keys are wrong or missing
         // from the application's language files. Otherwise we can return the line.
-        if (isset($line)) {
-            return $line;
-        }
-
-        return $key;
+        return $line ?? $key;
     }
 
     /**

src/Illuminate/View/Concerns/ManagesLayouts.php

@@ -146,11 +146,7 @@ protected function extendSection($section, $content)
      */
     public function yieldContent($section, $default = '')
     {
-        $sectionContent = $default instanceof View ? $default : e($default);
-
-        if (isset($this->sections[$section])) {
-            $sectionContent = $this->sections[$section];
-        }
+        $sectionContent = $this->sections[$section] ?? ($default instanceof View ? $default : e($default));
 
         $sectionContent = str_replace('@@parent', '--parent--holder--', $sectionContent);